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blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17911

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

irishhawk11 wrote:

--> Is it possible the the pressure valve released? I read that this needs to be replaced when the valve is triggered.

Yes, it is possible for the PRV to pop and the valve does not reset once popped. A popped valve is always always a consequence of a faulty VCV (remember that the VCV is the control for the fuel rail pressure) but most VCV fault do not cause the PRV to pop. If the PRV has popped the according to LR the entire fuel rail must be replaced, but aftermarket PRVs are available and it is possible to replace just the valve. However I don't think that this is what is happening in your case since the error code specifically reports that there is a fault with the fuel rail pressure sensor (the thing at the opposite end of the rail to the PRV) circuit, it is not reporting that there is no (or low) fuel rail pressure, which is what it would be doing in the case of a popped PRV. If you are going to randomly replace something you are probably better off replacing the sensor than the valve.

irishhawk11 wrote:

--> or could this failure be because I opened them middle valve of the fuel rail to check if fuel is coming, which wasn't the case...?

Unlikely unless whilst doing this you did collateral damage to something else. The centre union (and I presume you mean union and not valve) is the supply line from the HP stage of the pump into the rail and whilst loosening this will cause the rail to lose pressure and could conceivably allow air to enter the rail, the rail will self-bleed via the fuel return circuit. Remember that there is no need and no procedure for bleeding the HP circuit, only the LP circuit.

The P019015 error code ("Fuel rail pressure sensor A circuit - circuit short to battery or open") is very specific and points to an electrical fault not a fuel rail pressure fault. The lack of pressure is a consequence not the cause.

9th Jul 2025 3:31pm

irishhawk11

Member Since: 07 Mar 2022
Location: Feldkirch
Posts: 25

2011 Defender 90 Puma 2.4 HT Santorini Black

What u think regarding the fuelrail pressure when trying to start?

Click image to enlarge

i bled the fuel system and some air has come out but not a lot...

9th Jul 2025 4:56pm

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 814

If I'm reading that correctly there is no high pressure.. 250kpa is between 2 and 3 bar..you would need to see something approaching 200bar for the injectors to fire..

9th Jul 2025 6:49pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17911

The DTC is pointing to a problem with the pressure sensor so it is very unlikely you'll get sensible and correct readings.

As stated several times now you need to establish that the ECM is getting sensible measurements from the sensor.

9th Jul 2025 10:33pm

irishhawk11

Member Since: 07 Mar 2022
Location: Feldkirch
Posts: 25

Here a short video of the starting problem:

https://youtube.com/shorts/zi_O3sJ7px4?si=n9ZkaMiOSCsDI26y

9th Jul 2025 11:25pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8360

2011 Defender 110 Puma 2.4 USW Stornoway Grey

Have you checked the engine loom to vehicle loom connector at the rear right of the engine, it would be behind the vcv and area younwere working in. Cheers

James
110 2010 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

10th Jul 2025 10:22am

irishhawk11

Member Since: 07 Mar 2022
Location: Feldkirch
Posts: 25

Current Status

Hello Guys,

I just want to give you a brief update of my current situation.

What I have done:
-Replaced the VCV with now third one, a Denso VCV with positioning pins --> Problem remains
-Replaced the Fuel-Pressure-Valve --> Problem remains
-Checked the CPK-Sensor --> Engine Rpm available therefore failure can be excluded.

Checked voltages:
-Starter battery is done but still doesn't want to start with jump leads.
-Error code P019015 only exists when the Fuel-Pressure-Sensor is unplugged, therefor I don't think this is the issue.

I have now brought the Defender into an offroad workshop and will get news shortly. I will let you know ASAP.

Regards
Ben, a sad td4 owner[/list]

21st Jul 2025 12:25pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17911

So you actually haven't yet done what has now been suggested several times and investigate why you have an electrical fault in the pressure sensor circuit!

Good luck, looking forward to hearing what the problem turns out to be.

21st Jul 2025 1:00pm

irishhawk11

Member Since: 07 Mar 2022
Location: Feldkirch
Posts: 25

Hello again,

the error-message only should up when unplugged, otherwise the error-didn't appear.

Yes, its hopefully not a financial ruin topic.

Regards

21st Jul 2025 5:04pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17911

Yes, I'm afraid I missed that absolutely crucial piece of information which only came to light halfway down page 2 of the thread!

We'll still be interested to hear what your specialist comes up with and, as you say, hopefully it won't be major.

21st Jul 2025 5:56pm

irishhawk11

Member Since: 07 Mar 2022
Location: Feldkirch
Posts: 25

Failure solved - Defender up and running again

Hey guys,

Failure = Defect High Pressure Pump

The coincidence really puzzles me that 100km after replacing the VCV the high pressure pump fails... but anyways, it is fixed and cost me around €2.500.

Regards
Ben

4th Aug 2025 12:58pm

HardCharger

Member Since: 03 Mar 2013
Location: Manila
Posts: 786

2011 Defender 110 Puma 2.4 SW Stornoway Grey

Related question for anyone in the know, is there a repair kit or spring kit for the high pressure pump?

Apparently a certain spring could fail inside and render the high pressure pump kaputt. But if this spring can be replaced, the pump will work again. A friend of mine has resurrected 2.2 Ford Ranger fuel pumps this way. The cost of the spring is definitely cheaper than that of a new high pressure fuel pump.

If such a thing exists for 2.4 high pressure pumps, would appreciate information on where to buy the springs. No Better Friend, No Worse Enemy

5th Aug 2025 3:55am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17911

I'm not aware that anyone sells internal parts for the 2.4 pump nor of anyone offering a pump repair service, unfortunately. If anyone knows otherwise it would be good to hear.

The 2.4 pump, being a two-stage pump with internal regulation is of necessity a precision item and quite complex, and hence not cheap. It is however generally pretty reliable and failures are few.

5th Aug 2025 8:32am

andy63

Member Since: 30 Jun 2023
Location: north east
Posts: 814

HardCharger wrote:
Related question for anyone in the know, is there a repair kit or spring kit for the high pressure pump?

Apparently a certain spring could fail inside and render the high pressure pump kaputt. But if this spring can be replaced, the pump will work again. A friend of mine has resurrected 2.2 Ford Ranger fuel pumps this way. The cost of the spring is definitely cheaper than that of a new high pressure fuel pump.

If such a thing exists for 2.4 high pressure pumps, would appreciate information on where to buy the springs.

You sort of answered your own question, and I'd be asking your friend where he sourced the spring..
Ive just been over to tyne electro diesel and they will service and repair these common rail pumps if its a matter of springs seals etc in so far as internal wear will allow them to be refurbished.. so it is and can be done , but the sticking point for most of us is the pumps are calibrated and tested on specialist machinery and without doing that after reassembley you couldn't be sure what you would get if you just replaced it after any work..
I enquired about piezo injectors while I was there..
They will clean and test them but faulty injectors are replaced.. no refurbish of them..

7th Aug 2025 12:17pm

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